Postfix Slow Transaction Time

Hi,

I have 2 servers nearly same. One has dovecot, other has courier. This is the only difference.

I installed them via ISP Config Debian tutorials.

Problem is: the one with dovecot runs perfect but the other one is really slow with smtp.

Here is MXTOOLBOX reports:

This server works fine:

220 ****.******.com ESMTP Postfix (Debian/GNU)
Test Result
SMTP Reverse Banner Check OK - 94.73.130.154 resolves to ****.******.com
SMTP Reverse DNS Mismatch OK - Reverse DNS matches SMTP Banner
SMTP TLS OK - Supports TLS.
SMTP Connection Time 0 seconds - Good on Connection time
SMTP Open Relay OK - Not an open relay.
SMTP Transaction Time 1.045 seconds - Good on Transaction Time
Session Transcript:
EHLO please-read-policy.mxtoolbox.com
250-****.******.com
250-PIPELINING
250-SIZE 104857600
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN [172 ms]
MAIL FROM: <[email protected]>
250 2.1.0 Ok [172 ms]
RCPT TO: <[email protected]>
554 5.7.1 <[email protected]>: Relay access denied [172 ms]
QUIT
221 2.0.0 Bye [172 ms]


This one is slow with smtp (no problem with pop3)

220 ****.******.com ESMTP Postfix (Debian/GNU)
Test Result Hide
SMTP Reverse Banner Check OK - 85.159.70.125 resolves to ****.******.com
SMTP Reverse DNS Mismatch OK - Reverse DNS matches SMTP Banner
SMTP TLS OK - Supports TLS.
SMTP Connection Time 0 seconds - Good on Connection time
SMTP Open Relay OK - Not an open relay.
SMTP Transaction Time 11.216 seconds - Not good! on Transaction Time Ignore
Session Transcript:
EHLO please-read-policy.mxtoolbox.com
250-****.******.com
250-PIPELINING
250-SIZE
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN [172 ms]
MAIL FROM: <[email protected]>
250 2.1.0 Ok [172 ms]
RCPT TO: <[email protected]>
554 5.7.1 <[email protected]>: Relay access denied [172 ms]
QUIT
221 2.0.0 Bye [172 ms]

I see 250-SIZE is empty on slow one.

What can the problem be?

Thanks for help.

 

Thank you very much. It got dns from my kerio server. I changed them and everything works fine now.

Thanks again.